Bearing seal for mulling machines



Dec. 18,1934. H. s. SIMPSON 1,985,063

BEAR-ING SEAL FOR M ULLING MACHINES Filed OCb. 5, 1952 b g: g5.

Patented Dec. 1s, 1934 1,985,063

UNITED STATES PATENT OFFICE lBEARING SEAL FOB MULLING MACHINES v Herbert S. Simpson, Chicago, Ill.

Application October 3, 1932, Serial No. 635,996 R S z (o1. zas-5)' This invention relates to a sand mixing ma- The bearing rings 14 and -15 upon the shaft chine and concerns itself primarily with a bearare provided with roller raceways having termiing structure susceptible of adjustment externalnl shoulders 18 and 19 between which the rollly ofthe machine and without the necessity fo'r ers are confined against relative shifting move- .5 disassembling any parts. ment in'a vertical direction. The rings 12 and 5 The invention comprises the novel structure 13, however, have plain bearing surfaces over and combination of parts hereinafter described which the rollers can be adjusted in vertical diand more particularly pointed out and dened in rection. the appended claims. A sealing ring 20 is mounted upon the shaft 5 In the accompanying drawing which illustrates' above the conical ring 15. This ring has an out- 10 a preferred form of this invention and in which standing flange 20a providedwith concentric and similar reference numerals refer to similar feadownwardly extending ribs 21 and 22. A sealing tures in the different views: ring 23. is fastened upon the top of the sleeve 4.

Figure 1 is a fragmentary sectional view This sleeve has a short annular flange 24 that through a. sand mixing machine involving this flts within the upper end of the sleeve 4 and forms 15 invention with parts shown in elevation. an abutment for the ring 13. 'I'he ring 23 has Figure 2 is an enlarged fragmentary sectional an upwardly extending rib 25 located between the view illustrating the bearing and seal therefor. ribs 21 and 22 and an upward L-shaped portion In the drawing, there is shown a sand mixing 26 that is located between the rib 22 and the ator mulling pan 1, the bottom of which is provided taching portion ofthe ring 20 that surrounds 20 with a central opening surrounded by a downthe shaft 5. wardly offset flange 2. The flange 2 forms a seat Within the L-shaped portion 26 of ring 23 there for a radially extending ange 3 on a vertical holis an L-shaped ring 27 having one flange abutting low sleeve or bearing member 4 extending through one leg of the L-shaped portion 26, and the other the aperture in the base. This hollow bearing flange extending in a horizontal plane adjacent l25 member extends to a suitable height above the the bearing 13. Acurved ring 28 which rests upon bottom of the pan for supporting the operating' the horizontal flange of ring 27 and abuts the mechanism of the machine. hub of ring 20 bridges the gap between the ring A vertical shaft 5 extends through the hollow 27 and the hub of ring 20. A. resilient wire ring 30 bearingmember and is journalled therein by 29 or the like surrounds the curved ring 28 and 30 means of anti-friction bearings which can be adyieldingly maintains the same against its conjusted through vertical movement of the shaft. tacting parts. The lower end of the sleeve- 4 has a cylindrical A metal ring 30 in spaced relation to the ring 28 bushing 6 therein which abuts an interior shoulmay be fastened to the upstanding flange 0f ,theder 7 formed on the sleeve, A bushing 8 surring 27 and supported by a vertical ring 31 sup- 35 rounds the shaft 5 in concentric relation with the ported upon the ring 28. This construction probushing 6. Cylindrical rollers 9 are located bevides an effective seal for the bearing. tween the l'IWO bushings Which Serve aS bearings A narrow sleeve 32 may be attached to the shaft therefor. It will be noted that the upper end of 5 below the bearing 14 to support the same when l 40 the bearing bushing 8 abuts an annular shoulderthe shaft is adjusted and the parts 27, 28, 29, 30 40 10 0n the Shaft and that a Spring retainer 11 and 31 may be interposed between the sleeve 32 which may be partly lodged in a shallow groove and the sleeve 4 to seal the lower part of the bearin the shaft abuts the lower end of the bushing l8. ing.

Within the upper end of the sleeve 4 are annular A spider 33 is secured upon the upper end oi. conical bearing rings 12 and 13. A conical bearthe shaft 5 and is provided with a lower annular 45 ing ring 14 is secured upon the shaft 5 in conange 34 that surrounds the sealing rings 20 and centric relation to the bearing ring 12.` A second 23 to exclude the dust arising from the mixing and conicalbearing ring l5 is mounted upon the shaft agitation of the sand. This spider carries the 5 in concentric relation to the bearing ring 13 for mullers 35 that travel upon the sand in the pan.

60 relative slidable movement under certain condi- The shaft is adapted to be revolved by means of l50 tions. Conical rollers 16 are located between the a gear 36 attached to the lower end thereof and conical bearing rings 12 and 14 and conical rollers a ring 37 which surrounds the 'shaft 5 between 17 are located between the bearing rings 13 and the gear and the lower end of the sleeve 4 is re- 15. The divergence of the bearing surfaces of movably bolted to the lower end of the sleeve 4 the rings is toward the shaft. for retainingthe lower rollers 9 in place. -55

The upper end of the shaft 5 is threaded for receiving the nuts 38 and 39 the latter of which may be a lock nut, and a washer do is preferably placed between the spider and the nuts 38.-

When the cone bearings require adjustment in the event of wear or for any other reason, the nuts 38 and 39 may be screwed down against the spider for causing the shaft to move upwardly. During this movement of the shaft, the cone bearing 14 which rests upon the collar 32 will move upwardly with the shaft and carry the rollers 16 therewith until they wedge between their bearings. For it will be noted that the space between the bearings decreases as the bearing 14 is elevated. When the rollers 16 begin to wedge between their bearings, it will of course be impossible to elevate the shaft 5 any further so that further pressure of the nuts against the spider will force the same downwardly and cause the ring 20 to force cone bearing 15 downwardly for taking up any looseness of the rollers 17. l

From the foregoing, it will be apparent that novel and easily accessible adjustment has been provided for ythe inaccessible bearings upon a muller shaft and in which' the bearings are effectively sealed against the ingress of sand and dust.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. In a machine of the class described, a vertical sleeve, a vertical shaft in said sleeve, hearings meeneebetween the shaft and the upper end of said sleeve, a sealing ring attached to the upper end of said sleeve and extending over said bearing, said ring having an upwardly extending annular rib and an upwardly extending portion spaced in= wardly from said rib and provided with a horizontal iiange directed toward said shaft, a second sealing ring having a vertical ange surrounding said shaft and an outwardly directed flange extending over said first sealing ring, said second sealing ring having downwardly directed spaced annular ribs for receiving the rib of the first sealing ring therebetween, a sealing element bearing against the first sealing ring beneath the horizon tal flange thereof, a sealing element bearing against the vertical flange of said second sealing ring and yieldingmeans between said sealing elements.

2. In a machine of the class described, a vertical sleeve, a vertical shaft extending through said sleeve, bearings between said shaft and sleeve including a bearing between the upper end por tion of said sleeve and shaft, a sealing ring attached to the upper end of said sleeve and overlying the upper bearing, a second sealing ring having a vertical flange surrounding said shaft, and a horizontal flange overlying the rst sealing ring, said sealing rings having interiltting parts, means between said rst sealing ring and the vertical flange of the second sealing ring for A sealing the space between said rings, and a head on said shaft having a recess for receiving said sealing rings.

HERBERT S. SIMPSON. 

